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Finding the Fourth Proportional to 617,913.40, 866,945 and 617,913.40

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Solution

The fourth proportional to 617,913.40, 866,945 and 617,913.40 is: 866,945

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,913.40 : 866,945 = 617,913.40 : x
  2. Step 2: Convert to fraction form
    617,913.40/866,945 = 617,913.40/x
  3. Step 3: Cross multiply
    617,913.40x = 866,945 × 617,913.40
  4. Step 4: Simplify right side
    617,913.40x = 535,696,932,563
  5. Step 5: Solve for x
    x = 535,696,932,563/617,913.40
  6. Step 6: Final answer
    x = 866,945

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.